15. Area

1. If base of a parallelogram is 18 cm and its height is 12 cm, then its area = .....

2. If area of a parallelogram is 10. 50 sq.cm, its base is 2.5 cm then its height = .......

3. Area of a parallelogram is 4725 sqcm. If its height is 75 cm, the length of its base = .......